International Maths Olympiad Forum By SOF Olympiad Trainer - Page 654
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kushal from indian school sohar, sohar
Subject :IMO    Class : Class 2

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nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
P=l+b×2 L=5w B=w =5w+w×2 =6w×2 =12w cm

Ans 2:

Anil sinha from DPS, Chandigarh
Class : Class 4
Answer is B

Ans 3:

Shreyas K from Kennedy High The Global School, Hyderabad
Class : Class 9
6w

Ans 4:

Shivani Shivu Singh from Pawar Public School Chandivali , Mumbai
Class : Class 8

Ans 5:

MANAS RANJAN from Tender Heart Senior Secondary School, RANCHI
Class : Class 6
answer is 12W cm as the formula is 2*(length+breadth)=perimeter ,so w ( breadth) +5w (length) =6w (length+breadth) and then 6w *2 =12w(answer)

Ans 6:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
Breadth=w, Length is 5 times more, Therefore, length = 5w Therefore, perimeter=2(5w+w) =2*6w =12w Hence, b is the correct answer

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Ritin Jhamb from bjbj, Jalandhar
Subject :IMO    Class : Class 6

Ans 1:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9
The answer is d because 2/4 is smaller than 2/3.

Ans 2:

Shwetank Balaji Kotalwar from Orchid International Nigadi, Pune
Class : Class 6

Ans 3:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
But the shaded portion is equal in both the cases

Ans 4:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
yeah

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is D

 


Ans 6:

DEBOSMITA GARAI from G.D.BIRLA CENTRE FOR EDUCATION, kolkata
Class : Class 6
yeah....crrct

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Anshuman Mishra from kv no 3, Bhubaneswar
Subject :IMO    Class : Class 6

Ans 1:

Ishayu Poddar from NPS Whitefield, Bangalore
Class : Class 8
answer should be 16 as - coded for subtraction doesn't really code anything so it is 22-6=16

Ans 2:

Aniket kumar from kendriya vidyalaya, Delhi
Class : Class 8
actually! it is 32...........plz correct it

Ans 3:

Advik from DPS Patna, Patna
Class : Class 4
yes there is an error in the question

Ans 4:

Hprakash09 from Billabong high Bhopal, Bhopal
Class : Class 7
ANSWER IS 16!!!

Ans 5:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
the division sign represents both addition and subtraction and we can get to different answers

Ans 6:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
How can you change 2 to 3? and how can you mark division symbol as addition and subtraction? SOF DON'T DO SUCH MISTAKES OR WE'LL HAVE TO REPORT IT TO sofworld.org

Ans 7:

Karthik Reddy Munnangi from Chirec International School, Hyderabad
Class : Class 9
This question is not correct, as the division symbol is used for both addition and subtraction.

Ans 8:

Dheer Pandey from Sentia The Global School, Hyderabad
Class : Class 10
yes there is a problem in the question

Ans 9:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
WHY ARE YOU CONFUSING US AND WHY ARE YOU NOT PROVIDING CORRECT QUESTIONS AND WHY ARE YOU MAKING US LOSE OUR MARKS???????? SOF this is WRONG!!!!!!!!!!!!!!!!!

Ans 10:

student from school, city
Class : Class 10
Yes there is a problem in the question

Ans 11:

Garv Agarwal from Somerville School Noida, Noida
Class : Class 5
yes, and should be 32, which is not an option. Pl. correct this

Ans 12:

Vasudha from PSBB KK Nagar, Chennai
Class : Class 8
Please correct the problem

Ans 13:

Kavitharini Joseph from HUS, Chennai
Class : Class 6
yes pls correct the problem...

Ans 14:

Adhrit from CHSV, Chennai
Class : Class 8
Why do things like this ALWAYS happen with sof?

Ans 15:

Tapan from San Academy, Chennai
Class : Class 8

Ans 16:

Thalavai Kannan from Geetanjali olympiad school, bangalore
Class : Class 4
its wrong!!!

Ans 17:

Adhrit from CHSV, Chennai
Class : Class 8
The divisions sign is used in 2 places, but I think it means subtraction because '-' meaning subtraction is not exactly coding anything...And in that case 20 8/4-3x2=20 2-6=16...Which is not an options for whatever weird reason

Ans 18:

Shrutisri S G from Vyasa internationa school, bangalore
Class : Class 5

Ans 19:

Aaditva from Vasant Valley School, New Delhi
Class : Class 5

Ans 20:

Aditi Saha from Bishops KalyaniNagar, Pune
Class : Class 4

Ans 21:

Shreyans Mondal from Sri Chaitanya Techno School Kaggadasapura Campus 1, Bengaluru
Class : Class 10

Ans 22:

Joshua Sen from Montfort Senior Secondary School, Roorkee
Class : Class 10
division sign is both addition and subtraction....whyyyyyyy

Ans 23:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
the answer can be 31 and 13

Ans 24:

Sahil Tejam from NPS Indiranagar, Bengaluru
Class : Class 6
There is problem in the Q as it mentions division sign represents both addition and substraction

Ans 25:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
Then the calculation will turn to 20 +8/4x3x2, =20+2x3x2, =20+6x2, =20+12 =32, so there is a problem in the question

Ans 26:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10

Ans 27:

Nimisha Tambe from Narayana vidyalayam, Nagpur
Class : Class 8
there is problem in the question.....pls correct it

Ans 28:

VYOM VIVEK PATEL from Doon Public School Bhuj, Bhuj Kuchchh
Class : Class 9
The answer should be 16

Ans 29:

Arav Agarwal from Pathways School Gurgaon, GURGAON
Class : Class 6
Ya there is a problem...............answer is 32 you seee

Ans 30:

Kavneet Kaur from Sat Paul Mittal School, Ludhiana
Class : Class 8
There is a problem in this question. Please correct this.

Ans 31:

anveshi srimal from cathedral and john connon school, mumbai
Class : Class 7
yes please correct. There are 2 division signs which represent addition n subtraction which leads to various answers

Ans 32:

Subharsish Kashyap from Carmel school, Jorhat
Class : Class 8
There is a damn problem with this question .....Is this what I paid for?!?

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SHEETAL SHREYA MANJUSHA SANTHOSH from INDIAN SCHOOL MULADHA, MUSCAT
Subject :IMO    Class : Class 10

Ans 1:

Neha from Amity international, Delhi
Class : Class 10
C

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.

In ΔAED, 
∠AE D + ∠EAD + 90° = 180° (Angle sum property) 
⇒ ∠AED + ∠EAD = 90° 
⇒ ∠EAD = 90° – ∠AED ...(i) 
Also, ∠EAD = (50° + ∠AFB) ...(ii) (Exterior angle property) 
From (i) and (ii), we have 
50° + ∠AFB = 90° – ∠AED 
⇒ ∠AFB + ∠AED = 90° – 50° = 40° 
⇒ ∠AED + ∠CFD = 40°


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Saloni Saini from JPHS, Jaipur
Subject :IMO    Class : Class 5

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nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A.

In the 1st column, 2 X 1 + 1 = 3,

In the 2nd column, 12 X 9 + 9 = 117

Similarly, In the 3rd column, 7 X 14 + 7 = 105

Hence, the missing number is 7.


Ans 2:

Harshita Jain from CCA School, Gurugram
Class : Class 9
class:

Ans 3:

Shaurya Verma from NPS HSR, Bangalore
Class : Class 9

Ans 4:

Kumar Krishiv from Apeejay School, Noida
Class : Class 8
ss

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nimay gupta from Shiv Nadar School, noida
Subject :IMO    Class : Class 6

Ans 1:

Pisal Dhruv from Veer Bhagat Singh International School, Mumbai
Class : Class 7
either a or d

Ans 2:

Afrin Dewan from St.Stephens School, Kolkata
Class : Class 7
C is the answer...

Ans 3:

Akshaj V from PSBB Senior Secondary School, Chennai
Class : Class 6
The first and third letters are interchanged, and their immediate next letter is taken. The 2nd, 4th and 6th letter are directly written without any change. Same happens to 5th and 7th letters. This is the pattern here.

Ans 4:

Shaurya Verma from NPS HSR, Bangalore
Class : Class 9
C is the ans

Ans 5:

Aarush Ranjan from Seth MR Jaipuria, Rooma Kanpur, Kanpur
Class : Class 6
no idea bruh

Ans 6:

ARNAV MISHRA from delhi public school rohini, Delhi
Class : Class 7
no idea

Ans 7:

Daanish from No 2 KV Gwalior , Gwalior
Class : Class 6
Question is irrelevant?

Ans 8:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
No idea

Ans 9:

Shanvika U from SNG Vidya Bhavan, Bhilai
Class : Class 6
C is the Answer

Ans 10:

Sejal Mittal from dlf, ghaziabad
Class : Class 6
C IS THE ANSWER

Ans 11:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
No idea

Ans 12:

Sejal Mittal from dlf, ghaziabad
Class : Class 6

Ans 13:

R K Madhav from Kendriya Vidhyalaya Kottayam, Kottayam
Class : Class 7
No idea

Ans 14:

Sarthak Manishkumar Lad from Seven Square Academy, Mumbai
Class : Class 7
Wrong

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B Megashyam from Sri Chaitanya techno school, bengaluru
Subject :IMO    Class : Class 4

Ans 1:

somesh from Centre point katol road, Nagpur
Class : Class 6
A

Ans 2:

Vaishnavi from DPS , Singapore
Class : Class 4
its C

Ans 3:

saumit from Narayana E-techno, mumbai
Class : Class 5
Check the numbers then find the 4 in the ten thousand place

Ans 4:

Saksham Arora from DPS, Gurugram 102
Class : Class 9
all sports

Ans 5:

Ivjot Singh Hanspal from Allen Career Institute, Surat
Class : Class 9
All sports

Ans 6:

Manish Saruparia from NPS Singapore, Singapore
Class : Class 2
ya answer is A

Ans 7:

SURAJ from NPMHSS, CHENNAI
Class : Class 4
all sports

Ans 8:

MONIISH from GIIS, SINGAPORE
Class : Class 4
the answer is a

Ans 9:

Sourish from bgs nps, banglore
Class : Class 8
very easy bro! the answer is a (all sports)

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Shweta Garg from Vibgyor high, Vadodara
Subject :IMO    Class : Class 5

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